Old Shale Lace Knitting
Techniques used 
K: Knit
P: Purl
Yo: Yarn over
K2tog: Knit 2 together
Pattern
Multiple of 18.
Row 1 (RS): knit.
Row 2: purl.
Row 3: *(k2tog) x3, (yo, k1) x6, (k2tog) x3*.
Row 4: purl.
Repeat rows 1-4.